Combination-tool.



No. 707,723. Patented Aug. 26, I902.

F. A. ROBBINS.

COMBINATION TOOL.

{Application filed Jan. 20, 1902.)

(No Model.)

TAV'ILI-LE SEES.

FRANK A. ROBBINS, OF WORCESTER, MASSACHUSETTS.

COMBINATION-TOOL.

SPECIFICATION forming part of Letters Patent No. 707,723, dated August26, 1902.

Application filed January 20, 1902. Serial No. 90,391. -(No model.)

To all whom, it may concern:

Be it known that I, FRANK A. ROBBINS, of the city and county ofWorcester and State of Massachusetts, have invented certain new anduseful Improvements in Combination- Tools; and I do herebydeclare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, forming a part of thisspecification, and in which Figure 1 represents a side view of my saidimproved combination-tool shown in the position which it occupies whenused as a surface gage. Fig. 2 represents, upon an enlarged scale, a topor plan view of the parts shown in Fig. 8. All the following figures arealso shown upon the same enlarged scale.

' Fig. 3 is a side view of the upper part of the tool shown in Fig. 1,showingits position when used as a beam-trammel withcompasses orcalipers. Figsiet and 5 are transverse sections taken on lines 4 and 5,respectively, looking up, as is indicated by arrow 0, Fig. 1.

The object of my invention is to provide a tool principally for the useof iron and wood workers which shall combine three tools in onea surfacegage, a beam-trammel with compasses or dividers, and a beam-trammel withcalipers, which latter are adjustable, so that they may be used eitherfor inside or outside work. Said invention consists of certainimprovements in the construction of said combination-tool, whichcomprises a rod constituting the beam of the trammels, having adetachable base to be employed when the tool is used as a surface gageand upon which rod' are also mounted the trammels of the aforesaidcompasses or dividers and calipers, one trammel being preferably securedrigid to the outer end of the rod and the other fitted to be adjusted todifierent positions thereon and provided with suitable means forfastening the same after adjustment, as will be hereinafter more fullyset forth. 7

To enable others to better understand the nature and purpose of my saidinvention, I will now proceed to describe it more in detail.

Referring to the drawings, A represents the rod before alluded to. B isthe detachable base thereof, and C D are the trammels,which carry thecompass-points and caliper-legs of the tool. The base Bis employed onlywhen said tool is used as a surface gage, the same being fitted to slideonto the end of rod A and fastened by means of a set-screw B. Thetrammel O is similarly fitted and fastened to the opposite end of therod by a screw d, and the trammel D is fitted to slide thereon towardand from said trammel O to decrease or increase the distance betweenthem. The blocks 9 g of trammels G D, which are provided with suitableopenings to receive the rod, so as to slide thereon, are also providedwith threaded openings at right angles thereto to receive the innerthreaded ends of the compass-points e e and caliper-legs ff. Afterhaving been screwed therein, as is shown in the drawings, they arefastened from turning by the set-nuts h. Being thus fastened it isobvious that by loosening the nuts of the caliper-legs the latter may beturned to point inward toward each other, as is shown by full lines inFigs. 1, 2, and 3, so as to be used for obtaining the outside dimensionsof bodies, or they may be adjusted to point outward, as is shown bydotted lines in Fig. 3, for obtaining inside measurements, being held ineither adjusted position by tightening up said nuts again against thecentral slide-blocks g g, in which said caliperlegs are fastened.

As is shown in the drawings,each tram mel O D is provided with aseparate threaded openiug, one at each end thereof, at right angles tobeam Ato receive the compass-points and caliper-legs. Therefore eitherone separately or both may be employed upon the toolas, for instance, ifthe tool is desired to be used only as a compass the caliper-legs may beremoved, or, vice versa, if it is desired to use said tool only ascalipers, and when thus employed they may be readily adjusted for eitheroutside orinside calipers, as previously described. Then, again, if thetool is desired to be used only as a surface gage the caliper-legs maybe left off or not, one or both of the compass-points applied, and thebase secured to the bottom end of the rod or beam, and it is perfectlyadapted for said purpose at little trouble in adjustment and no extra100 expense.

The trammel O, as previously stated, is preferably secured rigid to theend of the rod A, and therefore may be made very simple in construction,consisting only of, the sliding block or bearing g, having thelaterallyprojecting threaded hubs g g for receiving and holding thecompass-point e and caliperleg f, respectively. The slide-block orbearing g is similarly construc'ted, except that in addition to the hubsg g thereof being threaded, as aforesaid, one of said hubs g is providedwith a threaded transverse opening parallel to rod A toreceive anadjusting-screw q), and said slide-block or hearing g is also preferablyprovided on the side next to trammel O with another huh g having anopening forming an extension of the opening in bearing g to receive rodA for the purpose of forming a longer bearing on said rod to hold thecompass-point e and caliper-legf more steadily in position and also toform a hub to receive a set-screw g to further facilitate said purpose.At the opposite side of slide-block or bearing 9' from trammel O isarranged another slide-block j, which is fitted to slide on rod A and issimilar in construction to said slide-block or bearing g, being providedwith a threaded opening parallel to the rod through one of its hubs g toreceive the adjustingscrew 2', before referred to,and with a threadedopening at right angles to said rod in its other hub g to receive theset-screw 7c.

The purpose of the foregoing construction of trammel D is to provide ameans of adjusting the compass-point e and caliper-legf to exactness byturning the adj usting-screw i in or out after said trammel has beenmoved bodily along the rod or beam A to about the,

desired distance from trammel C in obtaining the desired measurementsbetween the compass-points or the caliper-legs. In performing saidoperation the trammel D is first made free to slide on the rod or beamby unturning the set-screws g and 76. It is then moved bodily to aboutthe proper distance from trammel C to obtain the desired measurement,and the set-nut It turned up tight to hold the slide-block j rigid onthe rod or beam. By now turning the adjusting-screw tin or out theslide-block c, which carries the compass-point e and caliper-leg f, ismoved forward or back to the right point to obtain the exact measurementdesired, after which the set-nut g is turned up tight to hold the partsin a firm and rigid position.

While I prefer to employ the hub g and its set-screw g on theslide-block 9, since they are not an essential feature of my invention,I reserve the right to use the same or not, as desired, and also to makesuch other modifications in the construction as circumstances mayrequire, coming within the scope of my inventionas, for instance, thesize, shape, and length of the compass-points and caliperlegs may bevaried as circumstances in prac tice may require. It is preferable alsoin practice to mark a scale on the rod or beam A, as is indicated inFig. 1; but I do not limit myself thereto.

If desired, trammel 0 maybe made similar to trammel D and fitted toslide on the rod or beam without departingfrom the principle of myinvention. A pencil-point may also, if desired, be substituted for oneof the compass-points and the rod or beam A may be made to admit ofextension to any desired length.

Having now described my invention, what I claim therein as new, anddesire to secure by Letters Patent, is-

1. A combined surface gage and 'beamtrammel, comprising in combinationthe rod -A, base B, trammel O, the latter. secured to the opposite endof'said rod from said base, and carrying the compass-point e andadjustable caliper-leg f, and trammel D, the latter consisting of theslide-block g, carrying the compass-point e and adjustable caliper-legf, slide-block j, its set-screw 7t and adjusting-screw t', the latterfitted to turn in said slide-blocks g and j, substantially as and forthe purpose set forth.

2. Rod or beam A, trammel O, compasspoint e, and caliper-leg f, saidtrammel consisting of block g, fitted and secured to said rod 'or beam,and having threaded hubs at right angles thereto, to receive and holdthe threaded ends of said compass-point and caliper-leg, and means forlocking them in position, in combination with the trammel D,compass-point e and caliper-leg f, said trammel consisting of block g,fitted to slide on the rod or beam and having threaded hubs at rightangles thereto, to receive and hold the threaded ends of saidcompass-point and caliper-leg, and means for locking the same, alsohaving a threaded opening in one of the hubs parallel to the rod or beamto receive the adj usting-screw 11; said trammel further consisting ofthe block j, also fitted tov slide on rod or beam A, and having threadedhubs, one at right angles and the other parallel thereto, to receiverespectively, the set-screw 7t and said adjusting-screw 2', and said setand adjusting screws, substantially as and for the purpose set forth.

3. Rod or beam A, trammel C, compasspoint e and caliper-leg f, saidtrammel consisting of block 9, fitted and secured to said rod or beam,and having threaded hubs at right angles thereto, to receive and holdthe threaded ends of said compass-point and caliper-leg, and means forlocking them in posi tion, in combination with the trammel D,compass-point e and caliper-legf, said trammel consisting of block g,fitted to slide on the rod or beam and having threaded hubs at rightangles thereto, to receive and hold the threaded ends of saidcompass-point and caliper-leg, and means for locking the same, alsohaving a threaded opening in one of the hubs parallel to the rod or beamto receive the adjusting-screw 'i, and also having a hub g and set-screw9 said trammel further consisting of the block 7', also fitted to slideon rod or beam A and having threaded hubs, one at right angles and theother parallel ICC thereto, to receive respectively the set-screw 7c,and said adjusting-screw i7, and said set and adjusting screws,substantially as and for the purpose set forth.

5 4. The combination of rod or beam A, With trammel D, compass-point e,and caliper-leg f, said trammel consisting of block g, fitted to slideon said rod or beam and having threaded hubs at right angles thereto, tore- [0 ceive and hold the threaded ends of said compass-point andcaliper-leg, and means for locking the same, also having a threadedopening in one of the hubs parallel to the rod or beam to receive theadj usting-sorew 2', and

also havin" a hub and set-screw said tramrnel further consisting of theblock j, also fitted to slide on rod or beam A, and having threadedhubs, one at right angles, and the other parallel thereto, to receiverespectively the set-screw 7c, and said adjusting-screw 2', and said setand adjusting screws, substantially as and for the purpose set forth.

FRANK A. ROBBINS. Witnesses:

A. A. BARKER, L. P. GODDARD.

